@article{10_4064_aa113_3_2,
     author = {Paulo Ribenboim},
     title = {Fermat's equation for matrices or quaternions
 over $q$-adic fields},
     journal = {Acta Arithmetica},
     pages = {241--250},
     publisher = {mathdoc},
     volume = {113},
     number = {3},
     year = {2004},
     doi = {10.4064/aa113-3-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa113-3-2/}
}